Bad segmentation of corpus callosum in T1 pipeline

Questions about BrainVisa usage and installation

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houenou
Posts: 62
Joined: Tue May 31, 2005 2:28 pm

Bad segmentation of corpus callosum in T1 pipeline

Post by houenou »

Dear all,

I have a problem with the T1 pipeline with one subject.
The T1 pipeline doesn't include in its mask a part of the corpus callosum (a dorsal and posterior part)

I think it is mostly because of T1 bias correction as I can see the same bug on the hfiltered image

I have tried to tweak the field rigidity parameter from 0.1 to 300: 300 gave slightly better results but still without this part of the corpus callosum.
Switching to the old bias correction (Vip) has not changed anything, nor using Vip Histogram Analysis or Compute Brain Mask with the newest component (3 - Compute Brain Mask)...

Any ideas of the parameters I could tweak ??

Thanks,
Josselin
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Jean-Francois Mangin
Posts: 337
Joined: Mon Mar 01, 2004 10:24 am
Location: Neurospin, CEA, France
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Re: Bad segmentation of corpus callosum in T1 pipeline

Post by Jean-Francois Mangin »

We will switch to the 2010 pipeline in january Josselin,
hope everything will be overcome...
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